I have multiple project forms associated with one project, and each form has a unique single line text field that I'd like to concatenate in one spot. I did this with the other fields that have radio buttons or checkboxes, making reporting much easier. Is this possible with text fields?!
I would try a couple of things right off the bat. First I would try this:
CONCAT({"Other" Communication Topic}, {#2 "Other" Communication Topic}, {#3 "Other" Communication Topic}, {#4 "Other" Communication Topic}, {#5 "Other" Communication Topic})
If that doesn't work, I would rename your fields and try again with new field names. I recommend not putting any special characters like quote marks and hashes in field names. If you wanted to leave those in your field labels for your users to see, that's up to you, but they don't need to live in field names and so they shouldn't. Same goes for question marks, slashes, and ... well, any punctuation really.
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